Text (eye-readable)Readable text of the main work: this value is required, together with applicable <ProductForm> and <ProductFormDetail> values, to designate an e-book or other digital or physical product whose primary content is eye-readable text

9

37

✽

81

15

Extensive links between internal contentE-publication contains a significant number of actionable cross-references, hyperlinked notes and annotations, or with other actionable links between largely textual elements (eg quiz/test questions, ‘choose your own ending’ etc)

Additional eye-readable text not part of main workPublication contains additional textual content such as interview, feature article, essay, bibliography, quiz/test, other background material or text that is not included in a primary or ‘unenhanced’ version

Additional audio content not part of main workProduct is enhanced with audio recording of full or partial reading, performance, dramatization, interview, background documentary or other audio content not included in the primary or ‘unenhanced’ version

Additional video content not part of main workE-publication is enhanced with video recording of full or partial reading, performance, dramatization, interview, background documentary or other content not included in the primary or ‘unenhanced’ version